(NBC) - A burning building in downtown Sao Paulo, Brazil, collapsed early Tuesday morning as firefighters worked to put out a blaze that began in the middle of the night.
Firefighters said they believed there were victims but do not know how many.
The collapse was captured on camera with images showing the multi-story building falling as flames rage.
Debris could be seen smashing into the ground and occupying surrounding streets.
Local media outlets reported that the building was formally a headquarters for the federal police but had been abandoned for many years and was frequently occupied by squatters.
It wasn't clear how many people were inside when the fire began around 1:30 a.m. local time.
Courtesy NBC News Channel